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Determining the Role of Maternally-Expressed Genes in Early Development with Maternal Crispants
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Evolutionary genetics of maternal effects.

Jason B Wolf1, Michael J Wade2

  • 1Milner Centre for Evolution and Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath, United Kingdom. Jason@evolutionarygenetics.org.

Evolution; International Journal of Organic Evolution
|March 13, 2016
PubMed
Summary
This summary is machine-generated.

Maternal genetic effects (MGEs) influence offspring traits and evolutionary dynamics. Inbreeding amplifies MGEs, altering adaptive landscapes and potentially trapping populations at unavailable fitness peaks.

Keywords:
Kin selectionSocial effectsadaptive landscapedominancefrequency dependent selection

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Area of Science:

  • Evolutionary Biology
  • Genetics
  • Quantitative Genetics

Background:

  • Maternal genetic effects (MGEs) are crucial for phenotypic diversity across organisms.
  • Understanding MGEs is key to comprehending heritable and nonheritable variation patterns.

Purpose of the Study:

  • To investigate how MGEs influence evolutionary dynamics in randomly mating and inbreeding populations.
  • To examine the offspring genotype-phenotype relationship's role in MGEs' impact on evolution.
  • To reveal insights not evident in traditional quantitative genetic approaches.

Main Methods:

  • Utilized a single-locus model to analyze MGEs.
  • Examined the offspring genotype-phenotype relationship under selection.
  • Investigated allele frequency changes on adaptive landscapes.

Main Results:

  • Additive and dominance MGEs differentially impact evolutionary dynamics and variation, with inbreeding effects varying.
  • Dominance MGEs induce frequency-dependent selection, while additive MGEs cause parent-of-origin dependent variation.
  • Inbreeding enhances MGEs' contribution to additive genetic variance, accelerating evolutionary response.

Conclusions:

  • MGEs significantly shape evolutionary trajectories, especially under inbreeding.
  • The adaptive landscape influenced by MGEs can differ from the mean fitness surface.
  • Populations may face inaccessible fitness peaks due to MGEs and inbreeding dynamics.